With the development of 100G Ethernet becoming a trend, the market demand for 100G optical modules is increasing. Today, 100G optical modules account for a large proportion of network construction costs. Among these optical modules connecting 100G links, 100G QSFP28 has become the preferred module for 100G due to its small size and low power consumption.

What is QSFP28 optical module?

The 100G QSFP28 optical module is suitable for 100G Ethernet, EDR InfiniBand and 32G Fibre Channel, and usually has the exact same volume and panel density as 40G QSFP+. 40G QSFP+ uses 4 10Gbps channels, and the 100G QSFP28 module is similar to it, using 4 high-speed differential signal channels, the data rate supports 25Gbps, and the highest may reach 40Gbps. In addition, the QSFP28 has an upgraded electrical interface capable of supporting signals up to 28Gbps. QSFP28 SR4, QSFP28 LR4, QSFP28 PSM4, QSFP28 CWDM4, QSFP28 ER4. Compared with other package types of 100G optical modules (CFP/CFP2/CFP4), 100G QSFP28 has higher density, lower power consumption and obvious price advantage.

How to choose 100G QSFP28 optical module?

1. When the transmission distance is 5m-100m, it is recommended that you choose a QSFP28 SR4 optical module, which can transmit a distance of 70m on OM3 fiber and 100m on OM4 fiber.

2. When the transmission distance is 100m-2km, you can choose QSFP28 PSM4 or QSFP28 CWDM4 module. The unit price of CWDM4 is generally higher than that of PSM4, but CWDM4 only needs 2 single-mode fibers for bidirectional transmission, while PSM4 needs 8, so the overall cost of using QSFP28 PSM4 may be more expensive. Therefore, in practical applications, it is necessary to consider the specific transmission distance before deciding which module to choose.

3. When the transmission distance is 10km-40km, either QSFP28 LR4 optical module or QSFP28 ER4 optical module can be selected. The former can transmit up to 10km, and the latter can transmit up to 40km.

In general, 100G QSFP28 has the characteristics of high density and low power consumption. It can meet the current network requirements and prepare for future network expansion. It is an ideal optical module solution for large data centers. FiberWDM provides a variety of high-performance 100G QSFP28 optical modules, all modules have undergone rigorous testing to ensure product quality and compatibility. Welcome to consult!